Overview
The Square D FA24020AB is a thermal magnetic molded case circuit breaker designed for industrial and commercial power distribution applications. This 2-pole unit is rated 20 Amps at 480VAC with an interrupting rating of 18kAIC and is configured for I-Line panelboard mounting. The unit is used, fully functional, and available from PLC Machinery with same-day shipping and a 60-day replacement warranty.
Key Features
- Thermal magnetic trip function for reliable protection against overloads and short circuits
- I-Line mounting type for easy plug-in installation into FA Series panelboards
- Long time and instantaneous trip capabilities for flexible coordination
- Lug-type terminal connections supporting wire sizes from 14 AWG (copper) to 4 AWG
- Meets UL, CSA, CE, IEC, and Federal Specification W-C-375B/GEN standards
Technical Specifications
Input Voltage: 480VAC, 50/60 Hz; DC Rating: 250VDC | Current Rating: 20 Amps | Number of Poles: 2 | Interrupting Rating (AIR): 18kAIC @ 480V | Trip Type: Thermal Magnetic | Mounting: Plug-In I-Line Panelboard | Terminal Type: Lug | Wire Size (Min.): 14 AWG (Cu), 12 AWG (Al) | Wire Size (Max.): 4 AWG | Phase Connection: AB | Low Amp Trip Setting: 275A | High Amp Trip Setting: 600A | Frame Size: 100A/FA | Dimensions: 6.00″ H × 3.00″ W × 4.16″ D | Weight: 4.05 lbs. | Certifications: UL Listed, CSA Certified, CE Marked, IEC, Federal Spec. W-C-375B/GEN
Typical Applications
- Industrial machinery and motor control circuits
- Commercial building power distribution systems
- HVAC and refrigeration equipment protection
- Manufacturing facility electrical infrastructure
- Data center and telecommunications power systems
Compatibility & Replacements
Compatible With
- Square D FA Series I-Line Panelboards (Frame sizes 15–100 Amp)
- Schneider Electric/Square D electrical distribution systems
- Molded case circuit breaker standard installations requiring 480VAC rated protection
Replaces / Drop-In Replacement For
The FA24020AB is a standard FA-series breaker. For exact cross-references or alternative models, verify compatibility with your system integrator or electrical engineer before ordering. Square D produces multiple breaker series; ensure your panelboard frame matches the FA designation.
Works With
- Square D I-Line electrical distribution systems
- Standard industrial electrical control panels and switchgear
- Compatible with thermal magnetic protection schemes and coordination studies
